Geometry Analysis
In 3D components, when Conductor model of the parent feature is Homogenized multi-turn and Numeric is selected as Coil type, or if Conductor model of the parent feature is Single conductor in the Coil node, the Geometry Analysis subnode is added by default. To this, an Input (for Geometry Analysis) subnode is also added by default.
This subnode is needed to set up the automatic analysis of the coil geometry that can determine the direction of the wires (and of the current flow). The inlet and outlet boundaries for the wires are specified using the Input (for Geometry Analysis) and Output (for Geometry Analysis) subnodes.
To complete the setup for the computation of the coil direction, a Coil Geometry Analysis study step must be added to the study before the main study step.
If the model represents only a part of a geometry obtained from symmetry cuts (for example, a quarter of a circle), use the settings under Symmetry specification to specify appropriate correction factors. Enter the Coil length multiplication factor FL and Coil area multiplication factor FA (dimensionless integer numbers). The actual length of the coil, used to compute the coil voltage and resistance, is then computed as the product FL·L, where L is the length of the domain. The cross-section area of the coil is computed as FA·A, where A is the cross-section area of the domain. The values of L and A are computed automatically during the Coil Geometry Analysis study step.
Studies and Solvers in the COMSOL Multiphysics Reference Manual